

MCQOPTIONS
Saved Bookmarks
1. |
One cubic meter of some alloy is heated in a crucible from room temperature to 100 degree Celsius above its melting point for casting. The alloy density = 7.5 g/cm3, melting point = 800 0C, specific heat = 0.33 J/gC in the solid state and 0.29 J/gC in liquid state and heat of fusion = 160 J/g. How much heat energy must be added to accomplish the heating, assuming no losses? Ambient temp = 25 C. Density of solid and liquid are same. |
A. | 4535 * 10<sup>6</sup>J |
B. | 8735 * 10<sup>6</sup>J |
C. | 9135 * 10<sup>6</sup>J |
D. | 7835 * 10<sup>6</sup>J |
Answer» E. | |